firefox's file selector is really slow

when i go to upload a file to 4chan, and i hit browse, firefox takes like 10 seconds to read my /b/ directory.  what's the deal?

The GTK have a contest every few years about who can come up with the worst piece of shit common dialogues. Every time there's though competition, but the winner really excels.

GTK file chooser blows, is buggy, slow as fuck (try opening /usr/bin), scales pathetically, can't show other columns, can't be sorted, has shitty/buggy/useless/gotcha file completion, and is generally braindamaged in every thing.